Lens (Optics) from Wikipedia
Title: Lens as a Transmissive Optical Device
Summary:
A lens is a transmissive optical device that focuses or disperses light by means of refraction. It can be a simple lens consisting of a single piece of transparent material or a compound lens made of multiple elements. Lenses are used in various imaging devices such as telescopes, binoculars, and cameras, as well as in visual aids like glasses. Lenses are made from materials like glass or plastic and are ground, polished, or molded to the required shape. They can focus light to form images, unlike prisms, which refract light without focusing. Lenses also suffer from aberrations, which distort images, and these can be corrected through lens design[1][2].
Title: History and Applications of Lenses
Summary:
Lenses have a history dating back to ancient Egypt and Mesopotamia, with the earliest known lenses made from polished crystal, often quartz. The invention of the compound optical microscope and refracting telescope around the 16th century was a direct result of experimentation with lenses. Lenses are used in various engineering fields, photography, and medicine, and their applications are found in technologies and everyday objects such as mirrors, microscopes, lasers, and fibre optics[4].
Title: Camera Lenses
Summary:
Camera lenses are optical lenses or assemblies of lenses used in conjunction with a camera body and mechanism to make images of objects. They are made from materials like glass or plastic and are ground, polished, or molded to the required shape. Camera lenses can be permanently fixed to a camera or interchangeable with lenses of different focal lengths, apertures, and other properties. They are designed to correct aberrations as much as possible, and their construction allows for the reduction of various optical imperfections[5].
Citations:
[1] https://en.wikipedia.org/wiki/Lens_
[2] https://en.wikipedia.org/wiki/Lens
[3] https://simple.wikipedia.org/wiki/Lens_(optics)
[4] https://en.wikipedia.org/wiki/Optics
[5] https://en.wikipedia.org/wiki/Camera_lens
A lens is a transmissive optical device that focuses or disperses a light beam by means of refraction. A simple lens consists of a single piece of transparent material, while a compound lens consists of several simple lenses (elements), usually arranged along a common axis. Lenses are made from materials such as glass or plastic and are ground, polished, or molded to the required shape. A lens can focus light to form an image, unlike a prism, which refracts light without focusing. Devices that similarly focus or disperse waves and radiation other than visible light are also called "lenses", such as microwave lenses, electron lenses, acoustic lenses, or explosive lenses.
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Lenses are used in various imaging devices such as telescopes, binoculars, and cameras. They are also used as visual aids in glasses to correct defects of vision such as myopia and hypermetropia.
English
Alternative forms
- (misspelling) lense
Etymology
Borrowed from Latin lēns (“lentil”); Medieval Latin later taking on the sense of "lens"; a semantic loan from Arabic عَدْسَة (ʕadsa, “lentil; optic lens”).
